Defensive publication



TW DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.6. 1221. Identiflcation is by serial number 01. the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofllce makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 29, 1969 ACIDIC RESINS DERIVED FROM POLYMERS OR COPOLYMERS 0F CONJUGATED DIOLEFINS Gazi Basher Mourad Dickakian, Oxford, England (No. 8, Ar. Van Goolen, Brussels 15, Belgium) Filed Feb. 26, 1968. Published Apr. 29, 1969 Claims priority, application Great Britain, Feb. 27, 1967, 9,521/67 Int. Cl. C08f 29/08, 27/00, 27/25 US. Cl. 260-785 No Drawing. 8 Pages Specification Acidic resins are prepared by reacting a high 1,4-homoor copolymer of a conjugated diene (e.g. butadiene) with an a s-unsaturated dicarboxylic compound (e.g. maleic anhydride). The resultant adduct (substantially soluble in aqueous ammonia) is partially hydrogenated using standard hydrogenation conditions (e.g. 5 to 50 atm. H using a nickel-on-kieselguhr catalyst). Generally, 10 to 90% of the double bonds in the starting material will be saturated in the partial hydrogenation step.

The acidic resins thus obtained may be oxidized, hydroxylated, formoxylated, epoxidized or reacted with aminoand/or hydroxyl-compounds if desired. Upon rcacting the acidic resins with an alkaline material (e.g. ammonia), a water-soluble coating composition is obtained. These coating compositions are especially useful for electro-deposition and paint formulations. 

